Wore them with standard socks when temperature was 20 degrees. Feet froze. 2nd time at 20 degrees wore them over wool socks. A bit too thick for my shoes. Feet froze, but can't say if the tight fit in my shoes was a contributing factor. When temperatures are over the upper 30's will try again. Do appear to be water resistant.

no comment on quality or durability, but size is tricky. I wear a 10 to 10.5 US, and about 44 Euro, the large in the Hytrel were too tight, once I squeezed into them. The are not form fitting, so were loose in some areas, and tight around toe box.

I bought these to extend the season w/ my Nashbar Ragster II sandals and they help. My only problem is that they are hard to get on. I'm a thinner guy & wear a size 10 1/2 shoe(43/44) so I went with a XL sock thinking they should easily fit. Trust me, it isn't easy to get these on. If I'm an XL w/ my shoe size, these are a no-go for anyone bigger than me. I can get them on but it takes some annoying effort. Once on, the socks seem to be nice, I guess. They are on the thin side w/ a thin neoprene exterior layer and an ultra thin/low fleece lining. I haven't used them in rain yet but have used them in cold and wind with decent comfort. Below 45, I use an extra layer of socks - on top. You will never fit a sock under them unless they are a super thin & slick liner type sock, like silk, maybe & good luck w/ that... For the price, I am moderately happy w/ the purchase but do not expect miracles. These aren't quite what I was expecting and are different that any other neoprene product I own...

I wear these whenever cycling in below 40's temps. Need wool or other breathable socks underneath. Buy one size up. Not big deal to get on. Keeps your feet warm as temps decline. ( Only thing beyond this is to put heavier booties external to your shoes). Had them about 3 plus seasons and they are still in good shape.

I use these socks on my daily 9 mile commute in the winter once temps go below 20. They keep me warm and dry inside my Lake MXZ302 boots as well as my regular cycling shoes. When temps go below 0, I add a silk liner and am good to -20. I've used them for 4 seasons and have seen minimal wear. I had to buy some more because I loaned them to a friend, who absolutely loved them too.